<template>
 <section class="loginContainer">
        <div class="loginInner">
          <div class="login_header">
            <h2 class="login_logo">硅谷外卖</h2>
            <div class="login_header_title">
              <a href="javascript:;" :class="{on:loginWay}" @click="loginWay=true">短信登录</a>
              <a href="javascript:;" :class="{on:!loginWay}" @click="loginWay=false">密码登录</a>
            </div>
          </div>
          <div class="login_content">
            <form @submit.prevent="login">
              <div :class="{on:loginWay}">
                <section class="login_message">
                  <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
                  <button :disabled="!rightPhone" class="get_verification" :class="{right_phone:rightPhone}" @click.prevent="getCode">
                    {{Time>0 ? `已发送(${Time}s)`:'获取验证码'}}
                    </button>
                </section>
                <section class="login_verification">
                  <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
                </section>
                <section class="login_hint">
                  温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
                  <a href="javascript:;">《用户服务协议》</a>
                </section>
              </div>
              <div :class="{on:!loginWay}">
                <section>
                  <section class="login_message">
                    <input type="tel" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
                  </section>
                  <section class="login_verification">
                    <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                    <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                    <div class="switch_button off" :class="showPwd? 'on':'off'" @click="showPwd = !showPwd">
                      <div class="switch_circle" :class="{right:showPwd}"></div>
                      <span class="switch_text">{{showPwd ? 'abc':'...'}}</span>
                    </div>
                  </section>
                  <section class="login_message">
                    <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                    <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha" @click="getCaptcha" ref="captcha">
                  </section>
                </section>
              </div>
              <button class="login_submit">登录</button>
            </form>
            <a href="javascript:;" class="about_us">关于我们</a>
          </div>
          <a href="javascript:" class="go_back" @click="$router.back()">
            <i class="iconfont icon-fanhuijiantou"></i>
          </a>
        </div>
        <AlertTip :alertText="alertText" v-show="showAlert" @closeTip="closeTip"></AlertTip>
      </section>
</template>

<script>
import AlertTip from '../../components/AlertTip/AlertTip.vue'
import {reqSendCode,reqSmsLogin,reqPwdLogin} from '../../api'
export default {
  components:{
    AlertTip
  },
  data() {
    return {
      loginWay:false,//true代表短信登录，false代表密码登录
      phone:'',//手机号
      code:'',//短信验证码
      Time:0,//计时的时间
      showPwd:false,//是否显示密码
      pwd:'',//密码
      captcha:'',//图形验证码
      name:'',//用户名
      alertText:'',//提示文本
      showAlert:false,//是否显示警告框
    }
  },
  methods: {
    // 异步获取短信验证码
   async getCode(){
      // 如果当前没有计时
      if(this.Time===0){
        // 启动倒计时
      this.Time = 30
     this.intervalId = setInterval(() => {
        this.Time--
        if(this.Time<=0){
          // 停止计时
          clearInterval(this.intervalId)
        }
      }, 1000);
      // 发送ajax请求(向指定手机号发送验证码短信)
      const result = await reqSendCode(this.phone)
      if(result.code===1){
        // 显示提示
        this.Alertshow(result.msg)
        // 停止计时
        if(this.Time>0){
          this.Time = 0
          clearInterval(this.intervalId)
        }
      }
      }
    },
    Alertshow(alertText){
       this.showAlert = true
       this.alertText = alertText
    },
    // 异步登录
   async login(){
     let result
      // 前台表单验证
      if(this.loginWay){//短信验证
        const{rightPhone,phone,code} = this
        if(!this.rightPhone){
          // 手机号不正确
         this.Alertshow('手机号不正确')
         return
        }else if(!/^\d{6}$/.test(code)){
          // 验证码不正确
         this.Alertshow('验证码不正确')
         return
        }
        // 发送ajax请求短信登录
       result = await reqSmsLogin(phone,code)
       

      }else{//密码登录
        const{name,pwd,captcha} = this
        if(!this.name){
          // 用户名必须指定
         this.Alertshow('用户名必须指定')
         return
        }else if(!this.pwd){
          // 密码必须指定
         this.Alertshow('密码必须指定')
         return
        }else if(!this.captcha){
          // 图形验证码不正确
         this.Alertshow('图形验证码不正确')
         return
        }
        // 发送ajax请求密码登录
        result = await reqPwdLogin({name,pwd,captcha})
       

      }
      // 停止计时
        if(this.Time>0){
          this.Time = 0
          clearInterval(this.intervalId)
        }
      // 根据结果数据处理
      if(result.code === 0){
         const user = result.data
        //  将user保存到vuex的state
        this.$store.dispatch('recordUser',user)
        // 去个人中心界面
        this.$router.replace('/profile')
       }else{
        //  显示警告提示
         const msg = result.msg
         this.Alertshow(msg)
        //  显示新的图片验证码
         this.getCaptcha()
       }
    },
    // 关闭警告框
    closeTip(){
      this.showAlert = false
      this.alertText = ''
    },
    // 获取一个新的图片验证码
    getCaptcha(){
      // 每次指定的src要不一样
      this.$refs.captcha.src = 'http://localhost:4000/captcha?time='+Date.now()
  }
  },
  computed:{
    rightPhone(){
      return /^1\d{10}$/.test(this.phone)
    }
  },
}
</script>

<style lang="stylus" rel="stylesheet/stylus">
 @import "../../common/stylus/mixins.styl";
    .loginContainer
      width 100%
      height 100%
      background #fff
      .loginInner
        padding-top 60px
        width 80%
        margin 0 auto
        .login_header
          .login_logo
            font-size 40px
            font-weight bold
            color #02a774
            text-align center
          .login_header_title
            padding-top 40px
            text-align center
            >a
              color #333
              font-size 14px
              padding-bottom 4px
              &:first-child
                margin-right 40px
              &.on
                color #02a774
                font-weight 700
                border-bottom 2px solid #02a774
        .login_content
          >form
            >div
              display none
              &.on
                display block
              input
                width 100%
                height 100%
                padding-left 10px
                box-sizing border-box
                border 1px solid #ddd
                border-radius 4px
                outline 0
                font 400 14px Arial
                &:focus
                  border 1px solid #02a774
              .login_message
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .get_verification
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  border 0
                  color #ccc
                  font-size 14px
                  background transparent
                  &.right_phone
                    color black
              .login_verification
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .switch_button
                  font-size 12px
                  border 1px solid #ddd
                  border-radius 8px
                  transition background-color .3s,border-color .3s
                  padding 0 6px
                  width 30px
                  height 16px
                  line-height 16px
                  color #fff
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  &.off
                    background #fff
                    .switch_text
                      float right
                      color #ddd
                  &.on
                    background #02a774
                  >.switch_circle
                    //transform translateX(27px)
                    position absolute
                    top -1px
                    left -1px
                    width 16px
                    height 16px
                    border 1px solid #ddd
                    border-radius 50%
                    background #fff
                    box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                    transition transform .3s
                    &.right
                      transform translateX(30px)
              .login_hint
                margin-top 12px
                color #999
                font-size 14px
                line-height 20px
                >a
                  color #02a774
            .login_submit
              display block
              width 100%
              height 42px
              margin-top 30px
              border-radius 4px
              background #4cd96f
              color #fff
              text-align center
              font-size 16px
              line-height 42px
              border 0
          .about_us
            display block
            font-size 12px
            margin-top 20px
            text-align center
            color #999
        .go_back
          position absolute
          top 5px
          left 5px
          width 30px
          height 30px
          .iconfont
            font-size 20px
            color #999
</style>